The Rory McIlroy-Rickie Folwer rivalry -- which has some history -- started at the 2007 Walker Cup when Fowler, playing with Billy Horschel, beat McIlroy and Jonathan Caldwell. McIlroy did win both his singles matches against Horschel.
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Rory McIlroy drives the ball at the 2007 Walker Cup. No slouch off the tee himself, McIlroy still remembers Dustin Johnson's monster tee shot at the event. “He must have had a bit of adrenaline as well because he hit it about 400 yards," McIlroy said.
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Jamie Lovemark, Dustin Johnson, Rickier Fowler and Billy Horschel celebrate their win at the 2007 Ryder Cup at Royal County Down in Northern Ireland.
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Dustin Johnson and Colt Knost at the 2007 Walker Cup.
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Billy Horschel was part of a stacked 2007 U.S. Walker Cup team -- along with Kyle Stanley and Webb Simpson -- that proved too much for Great Britain and Ireland.
6 of 23Jacqueline Duvoisin/SI
Phil Mickelson at the 1991 Walker Cup at Portmarnock Golf Club in Ireland. Mickelson caused a minor tabloid scandal when asked by a TV reporter on Thursday to comment on a replay that showed him hitting out of the rough near the gallery, Mickelson chuckled and said, "That's not a place I want to be. The Irish women are not that attractive."
7 of 23Jacqueline Duvoisin/SI
Phil Mickelson signs autographs at the 1991 Walker Cup. The U.S. side won the event that year and Mickelson made a clutch up and down on the 18th hole to win his final singles match.
8 of 23Layne Kennedy
Minnesota native Tim Herron got to play a home game at the 1993 Walker Cup at Interlachen Country Club near Minneapolis. The U.S. won the Walker Cup that year.
9 of 23Layne Kennedy
Padraig Harrington played for the losing Great Britain and Ireland side in the 1993 Walker Cup.
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Tiger Woods lines up a putt at the 1995 Walker Cup. Woods, who suffered from food poisoning during the event, lost in singles to unheralded Gary Wolstenholme.
11 of 23David Cannon/Allsport
Tiger Woods strikes a heroic pose at the 1995 Walker Cup at Royal Porthcawl in Wales. However, Woods' Team USA lost to a Great Britain and Ireland team that included Padraig Harrington.
12 of 23David Cannon/Allsport
Justin Rose was only 17 years old when he played for Great Britain and Ireland in the 1997 Walker Cup at Quaker Ridge Golf Club in Scarsdale, N.Y. Rose went 2-2 for the losing side that year.
13 of 23AP
Matt Kuchar and Bryce Molder at the 1999 Walker Cup at Nairn Golf Club in Scotland. Great Britain and Ireland won the event that year.
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Luke Donald brings home the hardware at the 1999 Walker Cup at Nairn Golf Club in Scotland. Paul Casey also played on the winning Great Britain and Ireland side that year.
15 of 23David Cannon/Allsport
Graeme McDowell at the 2001 Walker Cup at Ocean Forest Golf Club in Sea Island, Ga. Great Britain and Ireland won the event that year.
16 of 23David Cannon/All Sports
Graeme McDowell at the 2001 Walker Cup, which was the first time Great Britain and Ireland had won back-to-back cups.
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Bill Haas at the 2003 Walker Cup at Ganton Golf Club in England. Great Britian and Ireland won its third-straight Walker Cup that year.
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Anthony Kim at the 2005 Walker Cup at Chicago Golf Club. Kim, who starred for the United States at the 2008 Ryder Cup, was on the winning side at the 2005 Walker Cup as well.
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Like Anthony Kim, J.B. Holmes played on the winning side at the 2005 Walker Cup [in photo] and the 2008 Ryder Cup.
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Rickie Fowler at the 2009 Walker Cup at Merion. Fowler was on the winning side in both Walker Cups he competed in.
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Rickie Fowler at the 2009 Walker Cup at Merion. The winning U.S. team included Peter Uihlein and Bud Cauley that year.
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Jordan Spieth was the top point-getter for the United States at the 2011 Walker Cup at Royal Aberdeen in Scotland, but Great Britain and Ireland won the event.
23 of 23USGA
Older photos of Walker Cup players are hard to find, but here's 1913 U.S. Open champion Francis Ouimet at the 1923 Walker Cup at St. Andrews. The U.S. side won the 1923 edition.
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